Related Experiment Video
Updated: Feb 16, 2026

Live-cell Video Microscopy of Fungal Pathogen Phagocytosis
Published on: January 9, 2013
Orbital granulomatosis with polyangiitis masquerading as invasive fungal sinusitis
David Xu1, Shawn R Lin1, Laura Bonelli1
1a Stein Eye Institute, University of California , Los Angeles , CA , USA.
Abstract:
A 55-year-old man presented with unilateral orbital inflammation and no light perception vision. Imaging revealed infiltrative enhancement of the optic nerve, orbit, and intracranial tissue. The case was suspicious for invasive fungal disease, but ultimate workup and orbital biopsy revealed granulomatosis with polyangiitis. The patient's inflammation resolved with corticosteroid and rituximab therapy. Granulomatosis with polyangiitis is a systemic vasculitis that can mimic a number of orbital pathologies.
Related Concept Videos
Atomic Orbitals
Molecular Orbital Theory I
Molecular Orbital Theory II
Hybridization of Atomic Orbitals II
Hybridization of Atomic Orbitals I
The Energies of Atomic Orbitals

